AOAC Test Method 993.3

Method information displayed is provided for informational purposes only.
ALS - Columbia may or may not offer methods shown. Please contact us to learn about ALS - Columbia's latest available methods. No warranty (express or implied) is made as to the website accuracy, completeness, or applicability (such as the age of a method and whether or not it applies to your project).

Source:
AOAC

Method Name:
Inorganic Anions in Water. Official Name: Inorganic Anions in Water by Ion Chromatographic Method

Description:
Anions in test sample are separated by ion chromatographic system containing guard column, separator column, and suppressor device and are measured using conductivity detector.

Scope:
Applicable to determination of bromide, chloride, fluoride, nitrate-N, nitrite-N, orthophosphate, and sulfate in drinking water and wastewater in the range shown in Table 993.30A.

Citation:
Official Methods of Analysis of AOAC International, 16th Edition, 4th Revision, 1998 Volume I

Interferences:
(1) Coeluting species (e.g., low-molecular-weight organic acids). (2) High concentration of anion can effect resolution of peaks and elution times. (3) Fluoride is especially sensitive to coeluting species, and "water dip" (corresponding to the elution of water) at low concentrations.

QC Requirements:
IDLC, LFB (4), LRB, FMR, FD, CV, QCS, PE (recommended)

Maximum Holding Time:
48 hours (NO2, NO3, orthophosphate) 28 days (others)

Media:
WATER

Subcategory:
Inorganic

Concentration:
0.3 - 100ug/L. Ranges differ for each analyte. This range is taken from the lowest and highest limit of the analytes listed in the method.

Precision:
-

Detection:
Lowest level from calibration range of the method.

Revision Number:
Final Action - 1997



Related Methods:
Test Method 500001    Test Method 500007    Test Method 500021    Test Method 500061    Test Method 500071    Test Method 500076    Test Method 500081    Test Method 500086    Test Method 500090    Test Method 500201   

<-- Search again



*Method information displayed is provided as a convenience only. No warranty (express or implied) is made as to its accuracy, completeness, or applicability (such as the age of a method and whether or not it applies to your project).

Suggestions? The test methods page continues to expand and improve. If you have suggestions for improvement, we would enjoy hearing from you. Please contact the webmaster here.